Half to jacob s



(No Model.) G. H. BARTLETT.

NOISELESS ATTACHMENT POR SCHOOL sLATs.

No. 498,456. Patented May 30, 1893.

fm: onine mns om wounfonymsnmarou. n.-a y

UNiTsD STnTns ATsNT Garten.

GEORGE H. BARTLETT, OF BETHLEHEM, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO JACOB S. MOYER, OF SAME PLACE. l

NOISELESS ATTACHMENT FOR SCHOOL-SLATES.

SPECIFICATION forming part Of Letters Patent No. 498,456, dated May 30, 1893.

Application filed November 8, 1892. Serial No. 451.291. (No model.)

To all whom it may concern: rows of holes b h, b b', of which one row b b Be it known that I, GEORGE H. BARTLETT, is adjacent to the inner, and the other row b of Bethlehem, in the county of Northampton bis adjacent to the outer margin of the frame, and State of Pennsylvania, have invented certhese holes being either disposed in pairs op- 55 5 tain new and useful Improvements in NoisepositeV each other and transversely of the less Attachments for School-Slates, 85o.; and I frame, as shown in Figs. 1 and 2, or arranged do hereby declare that the following is a full, alternately in staggered fashion, as shown in clear, and exact description'thereof, reference Fig.l 3. Through these holes b is laced a being had to the accompanying drawings, strand D or any number of strands, of braid, 6o

1o and to the letters of reference marked therecloth, felt, leather, rubber, or anyother maon, which form a part of this specilication. terial which will actas a cushion o r buffer to This invention relates to cushioning 'deprevent noise and breaking shocks to the vices for the frames of childrens or school frameBorbody portion A. The diterencebeslates such as are used for preventing noise tween the paired and staggered arrangement 65 r 5 and injuryto desks or other articles when the of the holes b b is simply that the exposed slates come in contact therewith. parts of the strand in the paired arrangement The invention consists in the matters herelie closer together than they do in the staglnafter described and pointed out in the apgered arrangement; the principle being the pended claims. same in both arrangements. In either case 7o 2o A cushioning device constructed in accordthe strandis passed successively through the ance with my invention consists of a marginal holes Z9 so as to be exposed at both sidesY of covering strip of cloth or felt, placed over the the frame B. In addition to the strands thus outer margins of the slate frame,and a strip arranged the frame is provided with a coveror strand of cloth or other cushioning mateing strip O of cloth or other suitable material 75 z 5 rial inserted or woven through holes or perwhich is adapted to deaden sound; the edges forations located in the frame inside of the or margins of such strip being cemented into covering strip, so as to rest against the side longitudinal grooves b2 b2 formed in each side faces of the frame at both sides of the same, of the frame near its outer margin. thus constituting additional cushioned wear- It is obvious that thevstrips or strands D l8o 3o ing surfaces for the flat sides of the frame arranged as described take much of the wear adapted to come in contact with the desk or which would otherwise come on the strip C other dat surface on which the slate rests between the grooves' and the margins of the when it is laid iiat. l frame, this result arising from the fact that In order that my invention may be fully the strands serve to sustain the frame so as 85 35 understood I will proceed to describe it with to lessen the pressure against the covering reference to the accompanying drawings, in strip when the slate rests or is pressed and WhGhrubbed against the desk or other supporting Figure 1 is a perspective view of a portion surface. Said strips or strands also form in of a school slate and its frame, with my ineffect a protection or cushion for the entire 9o 4o vention applied thereto. Fig.2 is a plan view surface of the flat sides of the frame, by which of a portion of the same. Fig. 3 is a view the same are prevented from striking and similar to that of Fig. 2 but showing a modimarring the covers of desks or other objects fled form of lacing. Fig. 4 is1 a transverse in the handling of the slate. section, taken on the line 4 4 of Fig. 2. I claim as my invention- 45 In the said drawings A designates the body 1. A slate frame provided with an adherent portion or writing surface of a school slate protecting covering extending over the marand B the frame thereof, it being understood gins of the frame and having its edges inthat these parts may be of the usual or any serted in grooves in the frame, and provided preferred material and structural character. with holes or perforations located inside of roo 5o In carrying out my invention I bore, or othand separate from said protecting covering, erwise form through the frame, two sets or and a strip or strand laced through the said 1o and a strip or strand laced through said perforations and extending across the at side faces of the frame inside of the said protectinge,r covering, substantially as described.

In testimony that I claim the foregoing as my invention I hereunto afx my signature in I5 presence of two witnesses.

GEORGE H. BARTLETT.

Witnesses:

C. CLARENCE PooLE, GEO. W. HIGGINS, J r. 

